O-E Vapor System Manual
This manual was created by O-E Specialty Manufacturing Co. and outlines how to install the "O-E" Perfect System, which is a Vapor Vacuum heating system.
Bundyweld Tubing
Bundyweld was lightweight tubing that came out of the automobile industry and was a radiant-heating alternative to wrought iron and steel pipe in the days following World War II when those metals were still scarce. This is an ad for Bundyweld Ceiling Radiant Heating from 1933.
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